Question

Using CMD line, in a given directory, I want to detect the most recently created/written folder and delete all the contents of that folder.

Any help/suggestions would be helpful.

Answer 1

This command prints all subdirectories in order of their last write/created time in reverse order (latest directories first):

DIR /A:D /O:-D /TW /B

To delete a directories’ contents, a simple

DEL /S /Q "directory"

should be sufficient

If you want to process only the first result of the DIR command, you can use a FOR loop in a batch file, that leaves after the first iteration.
It should look something like this:

@ECHO OFF

REM delete all contents from the sub directory most recently created or written to
FOR /F "delims=" %%A IN ('DIR /A:D /O:-D /TW /B') DO (
   RD /S /Q %%A
   EXIT /B
)

Only works for the subdirectories of the current working directory, so use with care!
I guess for empty directories there will be some weird output, but I didn’t test it.

EDIT:

Updated the batch file to remove the whole directory and its content using:

RD /S /Q "directory"